Stibiobetafite Mineral Data + Say STIBIOBETAFITE

General Stibiobetafite Information

Help on Chemical  Formula: Chemical Formula: (Sb+++,Ca)2(Ti,Nb,Ta)2(O,OH)7
Help on Composition: Composition: Molecular Weight = 433.88 gm
   Calcium   10.16 %  Ca   14.22 % CaO
   Tantalum  16.68 %  Ta   20.37 % Ta2O5
   Titanium   9.93 %  Ti   16.57 % TiO2
   Niobium   14.99 %  Nb   21.44 % Nb2O5
   Tin        2.74 %  Sn    3.47 % SnO2
   Antimony  19.64 %  Sb   23.51 % Sb2O3
   Hydrogen   0.05 %  H     0.42 % H2O
   Oxygen    25.81 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.1Sb0.7Sn0.1Ti0.9Nb0.7Ta0.4O6.8(OH)0.2
Help on Environment: Environment: Replacement masses and in veinlets, in a granite pegmatite in a serpentinite.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Vezna, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for antimony (STIBium) in its composition and membership in the betafite subgroup of the pyrochlore group.
 

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Stibiobetafite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.356, Z = 8; V = 1,110.65 Den(Calc)= 5.19
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.989(1), 1.561(0.4), 1.83(0.4),
 

Physical Properties of Stibiobetafite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown, Black brown.
Help on Density: Density: 5.3
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: brownish white
 

Optical Properties of Stibiobetafite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.38 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.367 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1503,KPDmeas= 0.1472,KC= 0.2373
Help on Optical Data: Optical Data: Isotropic, n=1.78.
 

Calculated Properties of Stibiobetafite

Help on Electron Density: Electron Density:

relectron=4.70 gm/cc
note: rStibiobetafite =5.19 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01767
Boson Index = 0.98233
Help on Photoelectric: Photoelectric:

PEStibiobetafite = 288.11 barns/electron
U=PEStibiobetafite x relectron=1,355.08 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stibiobetafite is Not Radioactive

 

Stibiobetafite Classification

Help on  Dana Class: Dana Class: 8.2.3.4 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.2)where (A)2 (B2O6) (O,OH,F)
  (8.2.3)Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)
 
8.2.3.1 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
8.2.3.2 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
8.2.3.3 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.3.4 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.3.5 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: IV/C.16-20 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.16 - Pyrochlore group, Betafite series with Ti > (Nb,Ta)
 
IV/C.16-10 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.16-20 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.16-30 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.16-40 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
 

Other Stibiobetafite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Stibiobetafite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Stibiobetafite

(Sb+++,Ca)2(Ti,Nb,Ta)2(O,OH)7
Dana No: 8.2.3.4 Strunz No: IV/C.16-20
Locality:

 

Notes:

 

 
   
 
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